Charles theryc and alfred oblasser



(N M 1; Q c. THERYG a; A, OBLASSER.

BOX FOR SECONDARY BATTERIBSfELEUTRIG CELLS, 850.

I Patented Aug. 1,1893.

UNITED STATES PATENT: OFFICE.

CHARLES THERYC AND ALFRED OBLASSER, OF PARIS, FRANCE.

BOX FOR SECONDARY BATTERIES, ELECTRIC CELLS, 80C.

SPECIFICATION forming part of Letters Patent No. 502,643, dated August1, 1893.

Application filed December 1,1892. Serial Ila 153,775. (No model.)Patented in France April 26, 1892, No. 221,204; in Switzerland October24, 1892, No. 6,030; in Belgium October 24, 1892, No. 101,872,- in ItalyOctober 25, 1892, XXVII, 32,886; in Spain October 26, 1892.110. 13,906,and in England October 26, 1892.110. 19,242.

To all whom it may concern.- Be it known that we, CHARLES THERYC andALFRED OBLAssER, citizens of the'Republic of France, and residents ofParis, France, have invented certain new and useful Improvements inBoxes for Secondary Batteries, Electric Cells, 850., which are fully setforth in the following specification, and for which we have obtainedLetters Patentin France, No. 221,204,

IO dated April 26, 1892; in Spain, No. 13,906, dated October 26, 1892;in Switzerland, No. 6,030, dated October 24, 1892 in Italy, XXVII,32,886, dated October 25, 1892; in Belgium, No. 101,872, dated October24, 1892, and in I 5 England, No. 19,242, dated October 26, 1892.

The invention has reference to the construction of boxes, vessels ortanks for electric batteries, particularly for secondary or storagebatteries, and consists (first) in the apzo plication to such boxes,vessels or tanks of an interior coating adapted to render the sameabsolutely tight, and impervious, and (second) in closing such boxes,vessels or tanks, with a special transparent covering as hereinafterpointed out.

In the accompanying drawings, Figure 1, is a longitudinal section; Fig.2, a top View and Fig. 3, an end elevation, of a battery tank or vessel,illustrating the practical embodiment of our invention.

The coating which we use for battery vessels, as well as for otherreceptacles that are to be water tight, is a substance which is adhesive, insulating and insensible to'electrical 5 influences, andunattackable by acids. We manufacture this coating by treating cellulosewith nitric or sulphuric acid to which may be added camphor or anysimilar substance, from ten to forty per cent. according to cir- 0cumstances. This mixture dried in the open air, in an oven or bycompression is then dissolved by ethers, by acetic or pyroligneous acidor by acetone or other solvent.

To obtain good results we prefer to proceed as follows :To the celluloseagglomerated in a vessel by means of camphor we add one liter of solvent(acetone, crystallizable acetic acid, acetic ethers, alcohol at 90 mixedwith one third of acetone,or acetic acid or ethers) for four hundredgrams of agglomerated cellulose. After mixing for from five to tenminutes the agglomerated cellulose is allowed remedy these defects it isnecessary to force the paste several times through afine sieve, orsubject it to a prolonged stirring or agitation. The removal of thewater renders the paste more adhesive. The same results may be obtainedby dissolving by the above described process cuttings, clippings orother waste substances having a cellulose base, instead of celluloseitself. To employ the composition thus obtained, we apply it with abrush, roller or in any suitable way, on the bottom and walls of thereceptacle, which may be of wood, fiber, pasteboard, or tissue, or anyother suitable material. By mixing our coating with certain substances,an agglomerate susceptible of molding may be obtained. Such agglomerateis composed of a paste, of any suitable solid substance such asasbestus, glass or other suitable minerals, broken or pulverized,saw-dust, cork shavings or powder, metallic-oxides, starch, resinoussubstances, pulverized coal. In these conditions instead. of making awooden or other vessel water-proof, the vessel or recipient may be madedirectly of the compound by molding.

The system of closing which we employ for our receptacle is as follows:Atransparent sheet of celluloid B is put under a frame A, which closesthe top of the walls and partitions of the box. This cover is fixed uponthe box by bolts C, of cellulose, elastic or other analogous material,and in the joint may be placed a packing of soft rubber. A

light cover is thus obtained which will allow of the examination of theinterior and a tight joint is assured without the use of metal, which isan advantage. Such a closing means may be used with any other receptaclewhich is intended to retain corrosive liquids.

Having now fully described our invention,

what we c1aim,and desire to secure by Letters specification in thepresence of two subscrib- Patent, is-- ing witnesses.

A battery tank or vessel provided with a CHARLES TI-IERYC. continuouslining of agglomerated cellulose ALFRED OBLASSER. 5 and hermeticallyclosed by a cover of trans- Witnesses:

parent celluloid, substantially as described. R0131. M. HOOPER,

In testimony whereof we have signed this VICTOR BARBANOE.

